Grease-cup.



GREASE our. APPLICATION FILED NOV. 26, 1907.

Patented 0cn.2o,19o'8.

P. L. BRoWN-.&. WSPRINK.

machine element to which the UNITED sTATns PATENT OFFICE.-

FREDERIUK L. BROWN .AND ISAAC WM. SPRINK, O1" SCOTTDALE, PENNSYLVANIA.

GREASE-CUP.

No. sonore.

Specicaton of Letters Patent.

Patented Oct. 20, 1908.

Application filed November 26, 1907. Serial No. 403,842.

automatic compression type wherein a spring actuated follower piston is employed to exert a constant pressure upon the lubricant to force it to the parts to be lubricated.

l One oi the most important objects of the invention is to produce a grease cup of the type mentioned above, for use infeeding heavy grease to locomotives or other large machinery, in which a novel form of guiding and locking mechanism is used to permit of the compression cap being easily moved to its locking position on. the body of the cup, notwithstanding the strong pressure exerted against such movement by the spring pressed follower' piston. v

Other objects of the invention will be apparent from the following detailed description. whentaken in connection with the accom anyi-ng drawings.

T 1e invention is susce tible oi' many modifications, but a preferre embodiment thereof is shown in the'ac'companying drawings, wherein- Figure 1 is a vertical sectional view of the improved grease cup, showing the same in its operative position with the parts under conipression. Fig. 2 is an elevation of the grease cup body, the compression cap 'being removed. Fig, 3 is a detail sectional view 'of the com ression cap and its attached parts.

Like c aracters of reference designate corres onding parts.

feferring to said drawings, 10 designates an internally threaded socket be forced, and into which is screwed a similarly threaded coupling end .11 of a cylindrical greas'e cup body 12. The body 'of the guiding groove or ath 13 which extends from a point slighty above said threaded portion to a point adjacent to the upper edge .of the said body portion, and terminates 1n a i vertically arranged entrance 14 which extends through said upper edge. The lower portiorro'l' the i ubricant is to end of the guiding groove or path terminates in an upstandinglreeper notch 15.

The closure for the grease"`cup body 12 comprises a compression cap provided with an enlarged overhanging head 16 from which depends a sleeve 17 the lower end of which is provided with an' inwardly projecting holding and guiding pin 18. size to permit of its bein@r telescoped over the body 12 ewith its inwardly projecting pin 18 resting within the spiral guiding groove or path. A retaining chain 1f) has one end sleeve, as at 19a, and its other end has a swiveled bolt connection 20 with a follower piston .21. A strong spiral com ression spring 22 surrounds Said retaining c lain 19, one end thereof being seated within a groove end being seated ina groove 24 formed in the follower piston 21.

ln operation., the threaded portion of the cup body is screwed into the portion 10 of the machine element, and the predetermined amount of the heavy Grease placed within the said body. The follower piston is then placed within the body on top of the grease, and the spring then compressed suiliciently to permit of t e guiding and holding pin of the sleeve being placed through the .entrance path oi' groove until' it reaches .the bottom will cause said cap to move vertically an cause said pin to enter the upstanding keeper notch, 4and thereby retain the cap securely in itslocked position.

From the foregoing description it will vbe apparent that by meanslo-f the spirally ,arranged guiding path or groove cooperating with the holding pin of the compressioncap, a strong leverage is obtained which facilitates the forcing down of the cap against the ex- Said sleeve is of al fastened to the head of said cap within the' 23 formed in-the head of the cap, its other thereof, whereupon vthe pressure of the'spring4- and into the spiral guiding groove or path; y At this oint, manual rotation of the cap will z f cause tie holding pin to easily follow the ccedingl'y strong pressure exerted thereagainst by the follower piston spring andadl ditionalrprossure incident to' the compression of the heavy grease used. And, it will be further understood, that b means of the retaining chain connection etween the head of the compression ca and the follower piston, said. piston is at a l times coupled to the 1 i nectlon between `the cham and the plston 1s l a swivels-.d one, the chain is free to revolve cap and removable with it, and as the conying kinked when putting on or taking oli the cap, there- E by obviating any danger of the chain becom Also, the length of the chain is such as to permit e full'stroke ofthe piston.,

We cleimrw l. A grease cup comprising n body portion provided with :in external spirelly errang-ed guiding groove, u compression cap -provided with'a sleeve telescoping over'the body und having e pin sliding in sind groove and hav- 1` ing a locking engagement therewith, and e spring-pressed fo lower piston.

2. ,A grease cup comprising a body portionprovided with an external spirally arranged guiding groove, e compression cap provided with e sleeve telescoping over the body portion and nde ted to engage with and be guided by saidp groove, end a follower piston having a, flexible connection with seid cap.

3. A reese cup comprising a body portion provide with en external spirnfily arranged guiding groove terminating in a keeper notch, e compression ce carrying e sleeve telescopingwith the bo y portieri and provided with a holding pin edfipted to be inserted into said uiding groove and be guided thereby to said ieeper notch7 and e follower piston having a swiveled and flexible connection with said compression cap.

4. A grease cup coin rising n body portion, a compression cfip, en a follower piston having a swiveled and exible connection with seid compression cap.

. 5. A grease cup comprisingzi body portion, g e compression cap, and d spring-pressed foll lower piston having n swiveled and iexible connection with said compression cap.

1, provided with a spirzilly arranged guiding groove terminating in :in upstanding keeper notch, a compression cop carrying a sleeve one end of which is provided with en inwn-rdly projecting pin adapted to enter said groove :ind be guided thereby to sind kee )er notch, zifollower piston having n swiveied l connection with seid compression cap, and ii spring interposed between seid compresseid swiveled connection.

7. A grease cup comprising n body portion groove terminating in en upstanding keeper notch, a compression oep carrying n sleeve one end o'l` which is provided with :in inwardly projecting pin adapted to enter said i groove and be guided thereby to said keeper notch, a follower piston, e chain having one end swivelcd to seid follower piston. and its other end connected to said compression ce find 'n spiral spring interposed between said compression oep and sind follower piston end surrounding seid chain.

In testimony whereof wev hereunto nflix our signatures in the presence of two witnesses.

FREDERICK L. BROWN 'ISAAC WM. SPRlNK. Witnesses f E. F. DOORLEY,' KATHRYN PHELAN.

provided with ai. spirzilly arranged guiding lil 6. A grease cup comprising e body portion rsion cup and seid piston nndl surrounding 

